Re: [PATCH v5 2/4] Bluetooth: hci_qca: Add support for QTI Bluetooth chip wcn6855

[Johan Hovold <johan@kernel.org>]

On Tue, Mar 14, 2023 at 11:44:14AM +0100, Johan Hovold wrote:
> On Sun, Mar 12, 2023 at 10:18:48PM -0500, Steev Klimaszewski wrote:

> > Works, but, not quite well, and with the nvm bits from Tim's patch, we
> > end up getting closer?  I think that is the best way to put it.  With
> > what we currently have, we end up loading hpnv21.bin for our nvm patch
> > file, however, we actually want (at least on my Thinkpad X13s) the
> > .b8c file from the Windows partition for our nvm patch; With the b8c
> > file symlinked to .bin with just my patch set, I am able to connect a
> > pair of Air Pods Gen1 to the ThinkPad and play back audio, as well as
> > use them for input.  With the .bin file that comes from
> > linux-firmware, they will still connect, however, they will randomly
> > disconnect, as well as the audio output is all garbled.
> 
> Hmm. Ok, but then we need to ask Lenovo and Qualcomm to release the
> firmware files we need for the X13s. Until then using your patch and
> "hpnv21.bin" at least works to some extent.
> 
> I could connect to one bluetooth speaker without noticing any problems,
> but I did indeed get some garbled output when connecting to another. I
> have not tried the .b8c file yet though, so this could possibly be some
> other incompatibility issue.

I just tried with the hpnv21.b8c from the (somewhat old) windows
installation on my x13s, but the bluetooth speaker that produced garbled
output with the firmware from linux-firmware still does so with the
windows file.

Johan